Revert "Revert "zen i/o""

This reverts commit b1095ab0487a84193841e6ff81679930241216cc.
Revert "Revert "add the simple i/o scheduler cleanly""

This reverts commit 45490e4842c823016c2580812b453130d8bb0a40.
Fix another incorrect instance of DVFS
Signed-off-by: scotthartbti <scott.hart.bti@gmail.com>
stage1: generalize mmc waiting
Signed-off-by: scotthartbti <scott.hart.bti@gmail.com>
Revert "Enable P2P interface."

This reverts commit 875b2d814602ed978563090e07c484f40dc81a45.